标题： 在sqrt(sNN) = 17.4 GeV的p+Pb和p+C碰撞中寻找直接光子 显示英文标题

标题： Search for direct photons in p+Pb and p+C collisions at sqrt(sNN) = 17.4 GeV

摘要： 对0.7 < pT <= 3.2 GeV/c范围内的横向动量，通过WA98实验在sqrt(sNN) = 17.4 GeV的p+C和p+Pb碰撞中确定了直接光子产生的上限。 结果与WA98在sqrt(sNN) = 17.3 GeV的Pb+Pb碰撞中的直接光子测量结果进行了比较。 讨论了可能的热直接光子贡献的含义。 显示英文摘要

摘要： Upper limits on direct photon production were determined as a function of the transverse momentum for 0.7 < pT <= 3.2 GeV/c with the WA98 experiment in p+C and p+Pb collisions at sqrt(sNN) = 17.4 GeV. The results are compared to direct photon measurements in Pb+Pb collisions at sqrt(sNN) = 17.3 GeV by WA98. Implications for a possible thermal direct photon contribution are discussed.